Method for manufacturing a friction ring having a conical or cylindrical friction surface

Abstract

In order to enable a friction ring comprising a supporting ring and a sintered friction lining to be produced without sintering the friction lining to an intermediate carrier, one initially forms a self-supporting moulded ring (7) from a compacted dry powder material (1), by pre-sintering or bonding using a bonding agent, whereafter the moulded ring is pressed into the supporting ring and the friction lining is produced by final sintering.

I claim: 
     
       1. A method for manufacturing a frictional ring having a circumferential frictional surface, the method comprising the steps of: manufacturing a ring-shaped supporting member having a first circumferential supporting surface;   moulding and compressing a sintering powder to provide a ring-shaped sinter powder member having a second circumferential supporting surface complementary to said first circumferential supporting surface;   pre-sintering said sinter powder member to provide a self-supporting mechanically stable friction member;   pressing said friction member into said supporting member with said first and second circumferential supporting surfaces adjoining each other;   sintering said friction member with said second circumferential supporting surface onto said first circumferential supporting surface of said supporting member.   
     
     
       2. The method of claim 1, wherein said circumferential frictional surface is of conical shape. 
     
     
       3. The method of claim 1, wherein said circumferential frictional surface is of cylindrical shape. 
     
     
       4. The method of claim 1, wherein said circumferential frictional surface is an outer circumferential surface. 
     
     
       5. The method of claim 1, wherein said circumferential frictional surface is an inner circumferential surface. 
     
     
       6. The method of claim 1, wherein said step of moulding and compressing said sintering powder comprises the step of filling said sintering powder into a ring-shaped mould and compacting said sintering powder therein. 
     
     
       7. A method for manufacturing a frictional ring having a circumferential frictional surface, the method comprising the steps of: manufacturing a ring-shaped supporting member having a first circumferential supporting surface;   extruding a sintering powder to provide a ring-shaped sinter powder member having a second circumferential supporting surface complementary to said first circumferential supporting surface;   bonding said sinter powder member by applying a bonding agent to said sinter powder member to provide a self-supporting mechanically stable friction member;   pressing said friction member into said supporting member with said first and second circumferential supporting surfaces adjoining each other; and   sintering said friction member with said second circumferential supporting surface onto said first circumferential supporting surface of said supporting member.   
     
     
       8. A method for manufacturing a frictional ring having a circumferential frictional surface, the method comprising the steps of: manufacturing a ring-shaped supporting member having a first circumferential supporting surface;   moulding and compressing a sintering powder to provide a ring-shaped sinter powder member having a second circumferential supporting surface complimentary to said first circumferential supporting surface;   bonding said sinter powder member by applying a bonding agent to said sinter powder member to provide a self-supporting mechanically stable friction member;   pressing said friction member into said supporting member with said first and second circumferential supporting surfaces adjoining each other;   sintering said friction member with said second circumferential supporting surface onto said first circumferential supporting surface of said supporting member.   
     
     
       9. The method of claim 8, wherein said step of bonding said sintering powder comprises the step of extruding said sintering powder to form a tube, pre-sintering said tube and cutting off ring-shaped slices from said extruded and pre-sintered tube thereafter. 
     
     
       10. The method of claim 8, wherein said circumferential frictional surface is of conical shape. 
     
     
       11. The method of claim 8, wherein said circumferential frictional surface is of cylindrical shape. 
     
     
       12. The method of claim 8, wherein said circumferential frictional surface is an outer circumferential surface. 
     
     
       13. The method of claim 8, wherein said circumferential frictional surface is an inner circumferential surface. 
     
     
       14. The method of claim 8, wherein said step of moulding and compressing said sintering powder comprises the step of filling said sintering powder into a ring-shaped mould and compacting said sintering powder therein. 
     
     
       15. A method for manufacturing a frictional ring having a circumferential frictional surface, the method comprising the steps of: manufacturing a ring-shaped supporting member having a first circumferential supporting surface;   extruding a sintering powder to provide a ring-shaped sinter powder member having a second circumferential supporting surface complementary to said first circumferential supporting surface;   pre-sintering said sinter powder member to provide a self-supporting mechanically stable friction member;   pressing said friction member into said supporting member with said first and second circumferential supporting surfaces adjoining each other; and   sintering said friction member with said second circumferential supporting surface onto said first circumferential supporting surface of said supporting member.   
     
     
       16. The method of claim 15, wherein said circumferential frictional surface is an outer circumferential surface. 
     
     
       17. The method of claim 15, wherein said circumferential frictional surface is an inner circumferential surface. 
     
     
       18. The method of claim 15, wherein said step of extruding said sintering powder comprises the steps of extruding said sintering powder to form a tube, pre-sintering said tube and cutting off ring-shaped slices from said extruded and pre-sintered tube thereafter. 
     
     
       19. The method of claim 15, wherein said circumferential frictional surface is of conical shape. 
     
     
       20. The method of claim 15, wherein said circumferential frictional surface is of cylindrical shape.